A PCB-layout-only remix of 1BitSquared/Black Sphere Technologies’ excellent Black Magic Probe v2.1. Designed to replace the fingerprint reader in the palm rest on some Thinkpads, because when have you _not_ needed an ARM debugger with a built-in UART port?
Runs stock firmware and grabs USB from the fingerprint reader’s FFC connector (well… +5VDC from the touchpad). Not tested on anything other than my X220 (but it seems to work!). Cable harnesses get stuffed in the o’l ExpressCard slot for storage.